Safety device



T. H. SEELY SAFETY DEVICE May 29, 1934.

y 1934- T. H. SEELY 1,960,287

SAFETY DEVICE Original Filed May 12, 1920 3 Sheets-Sheet 2 Ami/Z T. H. SEELY SAFETY DEVICE May 29, 1934.

Original Filed May l. 1920 3 Sheets-Sheet 3 Fig.4.

Patented May 29, 1934 SAFETY DEVICE Thomas H. Seely, Melrose, Mass, assignor to United Shoe Machinery Corporation, Paterson, Tel. 3., a corporation of New Jersey Original application May 12, 1920, Serial No.

380,897. Divided and this application December 39, 1929, Serial No. 417,474

19 Claims.

This invention relates to stopping and starting mechanisms and particularly to such mechanisms when employed in power-driven treadle-controlled machines such, for example, as hand method lasting machines of the type disclosed in United States Letters Patent No. 1,776,396, granted September 23, 1930, on an application of which the present application is a division.

Many power-operated machines, particularly those used in the manufacture of shoes, are treadle controlled and are preferably stopped with their operating instrumentalities in a predetermined position. It is necessary at times to adjust, test or repair such machines and in so doing to turn them over by hand while the power is on.

- Objects of this invention are to provide im proved mechanism which will aiford greater safety to the operator, who is working on the machine to put it in order, by preventing it from being accidentally tripped, and which will afford greater convenience to the operator when the machine is being turned over by hand, and to provide improved starting and stopping mechanism for driving the machine when doing its work and insure its stopping at a predetermined point in its cycle.

Accordingly, a feature of the present invention consists in an organization comprising a shaft, a brake to arrest rotation of the shaft, a clutch for controlling transmission of power to the shaft, manually operated means, such as a treadle, for first releasing the brake and then setting the clutch, and means, preferably adjustable at the will of the operator, to prevent movement of the manually operated means to set the clutch while permitting release of the brake.

Another feature of the present invention consists of manually actuated means for operating the machine in addition to the power means and mechanism controlled by the manually actuated means for rendering the power means ineffectual. In the illustrated machine means is provided for preventing operation of the manual means until after the power actuated means is rendered ineffectual. The effect of the illustrated novel construction with respect to the power and manual operation of the machine is to prevent the power means from being applied to operate the machine while the manual means is being used, and, conversely, to prevent the use of a hand operated means when the power means is being used. In the machine as illustrated, a transmission shaft is provided to which may be applied the actuating force either of the power means or manualmeans selectively.

In the operation of various kinds of machines, such as hand method lasting machines, it is desirable to bring the machine to rest at a particular point in its cycle, for instance, with the gripper open. This condition is usually attained through the expertness of the operator but in the hands of an inexperienced operator, it is difficult to bring the machine to rest at the proper point in its cycle of operation. A further feature of the present invention in this respect consists of a swinging arm which is actuated by driven means for applying the brake when the treadle is released. In the illustrated machine this result is obtained by connecting one portion of the swinging arm temporarily to a plunger actuated by a cam on a clutch driven member and applying a brake through another portion of the swinging arm. The rotary driven member, which is: to be stopped and rotation of which effects the application of the brake, is housed or encased within the machine frame, hence these portions of the automatic stop mechanism are so protected as to prevent injury to the operator.

In addition to the above features, the present invention includes other novel features and combinations of parts all of which will be hereinafter fully described in connection with the accompanying drawings which show one mechanical embodiment of the various new features andnovel combinations of the parts.

In the drawings,

Fig. 1 is a View partly in section and partly in side elevation of the head of a machine showing a the manual means for operating the machine;

Fig. 2 is a longitudinal sectional view of a portion of the baseof the machine taken along the line IIII of Fig. 3 and also showing the clutch mechanism;

Fig. 3 is a sectional plan view of a portion of the base of the machine, the section being taken along the line IIIIII of Fig. 2 looking toward the base;

Fig. 4 is a front elevation of a portion of the base of a machine;

Fig. 5 is a sectional view of a clutch actuating mechanism taken along the line V-V of Fig. 2;- and Fig. 6 is a detail view, partly in section, of a portion of the machine.

The machine frame comprises the base portion 34 from which rises the hollow column 35 into which telescopes the head supporting block 36; Fig. l, which is adapted to be raised and lowered III? to suit the height of the workman by means usual in machines of this type. The head block 36 serves as a support for the head frame 40 on which the lasting devices are mounted.

The illustrated machine derives its power from a driving shaft mounted in the lower part of the machine frame, such driving shaft and its operative connection with the power-transmitting mechanism being best illustrated in Figs. 2, 3 and 5.

Mounted in suitable bearings in a lower or base portion 34 of the machine frame is a driving shaft 42, one end of which finds support in a bearing 43, Fig. 2, while the other end is supported in a bushing 44 mounted within the column or machine frame at 45. The driving shaft 42 has secured thereto a belt pulley @6, which may be driven from a suitable source of power, as for instance by a belt 47, from an overhead or line shaft. The pulley 46 is secured to the driving shaft 42 by a set screw l8 and is provided with a flange 49 faced with a suitable frictional material 50, Fig. 2, and forming one member of a friction clutch. The other member of the friction clutch consists of a sleeve 51 movable endwise on the driving shaft 4i2'and provided with a flange 52 which may at times be frictionally engaged with the driving pulley. The sleeve 51 is operatively connected to a bevel gear 53 by projections 54 which engage complemental recesses 55, Fig. 2, in the hub of the bevel gear. The bevel gear 53 is rotatably mounted upon the bushing 44 and is held in fixed relation lengthwise of the driving shaft by a holder 56 having a flange 57.

engaging a circular groove 58 in the hub of the gear. By reason of the interengagement of the projections 54 and the recesses 55 as described, the sleeve 51 retains its driving connection with the gear 53 regardless of the position of the sleeve longitudinally of the driving shaft 42.

Mounted within and housed by the machine supporting frame is a clutch driven member illustrated as a transmission gear 59, Fig. 2, which meshes with the clutch driven bevel gear 53 and transmits power to the machine when the clutch is set. The transmission gear 59 is supported by a tie-beam 60 extending crosswise of the machine frame Within the hollow base, and the hub portion 61 of the transmission gear has lateral support in the bearings 45. A treadle 62, Fig. 4, is pivotally mounted on the base of the machine frame at 63, and is provided with a foot-piece 64. The other end of the treadle 62 is pivotally connected with a sliding rod 66 which is movable in a guideway 67 and has connected at its upper end at 68 a swinging yoke 69. The yoke 69, as best indicated at Fig. 5, carries rollers '70 which engage a circular groove or track 71 formed on the sleeve 51. A spring '72 normally acts to hold the rod 66 and hence the yoke 69 in its lowered position, Fig. 2. In the illustrated machine, the spring 72 has one end attached to a lever arm 73 and the other end to a fixed part in the machine base. The other arm '74 of the lever has an adjusting screw which normally bears upon an abutment '75 formed on the yoke 69. The yoke 69 has adjustably connected to its upper end a block 76, Fig. 2, to which is pivotally connected at '77 a strut 78, the construction being such that should the upper end of the strut '78 be held from bodily movement to the left, Fig. 2, and the treadle be depressed, the yoke 69 will swing to the right about its pivotal connection 68 with the rod 66 and effect engagement of the clutch members, and hence power actuation of the driving shaft 42; but should the upper end of the strut '78 be permitted bodily movement, to the left, Fig. 2, when the treadle is depressed, the yoke 69 would not be swung to effect engagement of the clutch members. In other words, depression of the treadle always elevates the rod 66 and if the strut '78 is held against movement to the left, the yoke 69 will swing about its pivot, thereby efiecting the engagement of the clutch members.

Housed by and extending upwardly within the column 35 of the machine frame is a transmission shaft 79, the lower end portion of which is formed non-circular in cross section and telescopes within a correspondingly-shaped opening 81 formed in the hub of the transmission gear 59.

Loosely mounted upon the transmission shaft 79 is a sleeve 82, Figs. 2 and 3, which is capable of endwise and turning movement on the transmission shaft 79 by a hand-piece 83, Fig. 1, constituting the manually-operated element for turning the machine by hand.

The lower end portion of the sleeve 82 is provided with an abutment 84, Fig. 3, which may be conveniently formed by slotting the sleeve 82 longitudinally. The upper end portion of the strut 78 is provided with a head 85 which has a shoulder 86 adapted to rest against the abutment 84 of the sleeve. The head 85 is held against vertical movement and guided for lateral movement relative to the vertical axis of the shaft 79 by a pin 87 extending through the machine column. When the sleeve 82 is in the position indicated in Fig. 3, the shoulder 86 of the strut bears against the abutment 84 of the sleeve; and if the treadle be depressed with the parts in this position, the yoke 69 will be moved laterally to effect engagement of the clutch members. If, however, the sleeve 82 be turned backwardly, or clockwise, by the hand-piece 83 as hereinbefore described, the abutment 84 of the sleeve 82 will be moved backwardly from the shoulder 86 of the strut and free the upper end or head portion 85 of the strut to backward or lateral movement such that should the treadle be depressed, the upward movement of the yoke 69 will cause lat eral movement of the upper head portion 85 of the strut without placing the clutch members in operative relation. To insure such lateral or backward movement of the head 85 of the strut when the sleeve 84 is turned clockwise, viewing Fig. 3, the head 85 has a portion 88, which is adapted to be engaged by the abutment 84 of the sleeve and positively moved to carry the upper end of the strut 78 backwardly as the sleeve is rocked on the transmission shaft. This insures that the power operation of the machine, by depression of the treadle, will be rendered impossible when the sleeve 82 is rocked in the manner described, by the hand-piece 83.

It is convenient at this point to describe the means provided for effecting the hand or manual operation of the machine, and the interdependmachine is a locking ledge 90 under which one :'1

member of the bifurcated end portion of the hand-piece 83 extends when the machine is be ing operated by power, and a lug 91 on the handpiece 83 at such time is engaged with a locking recess 92, the construction being such that when the machine is being operated by power, or is ca-, peble of in so rep n ed he ehehh'e Lee-9f the sleeve 82 is positioned as indicated in Fig. 3 e p n lei re movemen 9 th hee e the strut 7 and h -pi e eehheh be e e ehtally or otherwise manipulated to .efiecthand op.- e heh e the las mea heeeus th le everhe @1 of .bhere e en p t on .Q the hn *P. .3=h prev nt h vem'eni e th hand-piece about thelug 91 as a fulcrum to raise the sleeve 8 2. Secnred to the transmission shaft 79 is a transmission cam 93, the hub portion 940i which, Fig. 1 is provided with one or more re.- cesses 96 adapted to be engaged by a projection 95.91 thesleeve .82 whensuch sleeve is prelimih i eeke b t e hend i es 1:0 brin t p ei ehe eh t v e st r-wh or o p s t nne of t r ees e 9- Ass ine h a t to he re.- sitioned for power operation of the machine as indicated in Figs. 1 and 3, ifv it be desired to 0perate the machineman ally, the hand-piece B3 is fi stl f te h s-en a he lu 1 e t e han h e e he h .leeh he ee e Wh reuhe the heedie nd s eeve 8. may h -pre hhineril moved about the transmission shaft 79 to-bring a lug 9 5 of the sleeve opposite one of the notches 9f h reh m e eem- Th mo eme 9. the hand-piece rochs the sleeve 3,2,to carry the sa een 8 at h l w e d e th le e from t 91 1 9 f 1. h ad 3 fe t th upp en of the strut 7,8, and causes the head to be QYQd ei re hu thr-e h the pewer-eeth hhe means ohte eh m es eh, ve though th hea e be depressed. By this same movement the arfm oi the bifurcated end portion of the hand-piece is broi ght into position t o clear the ledge 90 when moved vertically.

'Ifhe outer end of the hand-piece may then he de ssed h e ee h sl ev 'hz h eese re m ssie ee en he h h n e ie may furth r mehi le-ted h hi the he em ss eh cam, andhence, the lasting means for operate 1 ma ne by h n ni- 9 1 9 W19?! 1? i e e h n re th mach n b newer. a ter it has been operated manually, the enter end of the hand-piece is allowed to rise, thus disengaging h sleeve e the ransm s o eem end he is moved laterally to place the lug 91 in: the loci;- ing recess 92, whereupon the sleeve 8; is caused to rotate counterclockwise, Fig. 3, toplace the abutment 84 of the sleeveagainst the shoulder 36 of the strut head. if the treadle he then do: pressed, the machine may be power driven. The adius or t r i movemen th heh h eee 8.3 wh n o era in h m n meh ell is eier ably about one-fifth of a circle; consequently to turn the machine one revolution by hand, the h' epi e is re ui e h b ma i ulate fiv times. This is a convenient arrangement .of the parts, but of course the invention is not restricted in this respect, and the radius of movement may be larger or smaller, as circumstances may dies tate.

When the machine is to be stopped, it is desire able that it be brought to rest at a predetere mined point in its cycle. The mechanism provided by the present invention for accomplishing this result is best illustrated in Fig. 2. The trans mission gear 59 housed within the machine colis provided with a cam 97 formed on the hub 61 of the transmission gear, upon which rides a roller 98 carried by a plunger 99. extending throu h the supporting column and guided for h 'eeehnsme emehi- A p ing 0. ne r l me hiel hs th nge 99 w h the oll i eente t with t ham. b t-p nnie reei reeetieh of the plunger during rotary movement of the hehem e ien e r- .l l i ht in th l n -9 s eeeehe pl nger-er. eeieheerr r 1 :hhY- h 1e head 102 normally pressed .ontwardly into ,coneei-Whh should on the lu :by a sp in 19 ieh eer a i s o t nd a n a c l-er W eheh whie ressesein 1 The p u er 101 has a slot 106 and an adjusting screw 107 is threaded into the plunger 101, the end of the screw being adapted to bear against the pin underthe stress of the inner spring103 which eie heh th ella 0? em he qhe y he lly l eree the Pi 1105 .e eh t e e la so the 21. eers .eeeih i th end. .e t e adj sth ser w .07 iheeeihehh serew- 07 eerrie a as er e eel e 10. ie- .2. h ld in hlee bye leehhh 1.0.9 on the shrew 7. t e e hshu tion heihs seeh hat b man pulation of the leek .199. ehd se ew .107 the tension e the r n 0 may be varied. The spring 103 is the yielding ele heht. t r u h whi h th v tward mo emen e th .Plhh er 97. i tren m d t t b ake ehd the .eei tmeht efer e e e e e the p e sure 9 the blieh he he ne etedat w ll hd to be yi l ihe y appli d. eswi l p e n pe r ehh ed 5 i e ek t 10 ec e h th l wer e -hen e th mee ih reihe s e s gin hre. --e h. ne-a m 1 h h is pivo ed a 112 to the bra ke Th g n erm a rie e a ch 1. 3 e e eie eh rm Wh is hiehhi d e e- 15 i -e. e t wing n erm, 1. 'I h be n sueh tha when e t ead i released the eteh ll: W, 'b ;-I QY -RO the pat o th eel.- a r at h 11.0.8 a a smit he yi din o w rd m vem nt .of th plung r t the swin -ins am 111 he lowe p n of th arm 111 is provided-with an adjustin scr w 117. Fi ,2. which normally bears against the head ofa brake pin 118. e The brake pin 118 is carried by a brake shoe 119 which may be faced with friction mate.- rial 120, and a spring 121 is interposed between ashoulder 122 of the brake shoe and a fixed por.- tion 123 of the machine frame to normally move the brake shoe into-its non-braking position or outwardly.

The-transmission gear 59 carries a flange 124 to receive the brakingimpact of the brake shoe. An adjusting screw 125 extending through a lug 126 formed-on the bracket 11 0 limits the swinging movement of the swinging arm lll to the right, orcloc kwise viewing Fig. 2, under the outward impulse of the spring 131. From the constrnction described it will be apparent that when the treadle 62 is released, to stopthe power operation of the machine, the latch 113 will be moved into the path of the collar or catch 108 on the plnnger, and as the plunger is moved outwardly by the cam 97 on the hub of the transmission gear 59, it will act yieldingly to apply the brake and eiTect stoppage of the machine in a predetermined position.

It will be apparent, from the construction above describedthat, when the hand piece 83 s m ni ulated t e eese h abutmen 8 f the. stru .8, h treedl a b d p ess With ut a l w the p ing 121 t re rac t e ak shoe 1. .9

e nter endh re her rm 11. i e heete to the re d =6 e in 6. th con tr ction so that the machine can be readily turned over by hand.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a device of the class described, the combination of a shaft, a brake to arrest rotation of the shaft, a clutch for controlling the transmission of power to the shaft, manually operated mechanism for first releasing the brake and then setting the clutch, and means to prevent movement of the manually operated mechanism to set the clutch while permitting release of the brake.

2. In a device of the class described, the combination of a shaft, a brake to arrest rotation of the shaft, a clutch for controlling transmission of power to the shaft, manually operated mechanism for first releasing the brake and then setting the clutch, and means adjustable to prevent movement of the manually operated mechanism to set the clutch while permitting release of the brake.

3. In a device of the class described, the combination of a shaft,'a brake to arrest rotation of the shaft,.a clutch for controlling transmission of power to the shaft, manually operated mechanism for first releasing the brake and then setting theclutch, and means adjustable at the will of the operator to prevent or permit movement of the manually operated mechanism to set the clutch while permitting release of the brake.

4. In a starting and stopping mechanism, a drive shaft, treadle controlled power actuated means for operating the drive shaft, manually actuated means for operating the drive shaft,

and connections between the power means and the manual means positioned by a preliminary movement of the manually actuated means for rendering the power actuated means ineffectual.

5. In a starting and stopping mechanism, the combination of a shaft, a treadle controlled power. actuated means for operating the shaft, manuallyactuated means for operating the shaft, and connections between the power means and the manual means which render actuation of the treadle ineffectual to start the power actuated means while the manually actuated means is being used to operate the shaft.

6. Ina starting and stopping mechanism, the combination of a drive shaft, a clutch, means for actuating the clutch to operate the drive shaft by power, manually actuated means for operating the drive shaft, means for locking the manual means in inoperative condition when the shaft is operated by power, and means rendered effectual by a preliminary movement of the manual means from locked position for rendering the clutch actuating means ineffectual to apply the power.

7. In a starting and stopping mechanism, the combination of a shaft, a brake to arrest rotation of the shaft, power means and manual means for operating the shaft alternatively, and means constructed and arranged to permit release of the brake while preventing operative connection between the shaft and one of said actuating means while the other of said actuating means is operatively connected thereto.

8. In a starting and stopping mechanism, the combination of ,a shaft, a brake to arrest rotation of the shaft, a clutch for controlling the trans.- mission of power to the shaft, manual means adapted to be operatively connected to said shaft, and means for permitting release of the brake while preventing operative connection between the manual means and the shaft while the clutch is operatively connected to the shaft.

9. In a starting and stopping mechanism, the combination of a transmission shaft, power means for operating the shaft, manual means for operating the shaft, a sleeve on the shaft, and means for connecting the sleeve and shaft to render the shaft operative by the manual means and rendering the power means ineffectual to turn the shaft.

10. In a starting and stopping mechanism, the combination of a transmission shaft, power means and manual means for operating the shaft, each to the exclusion of the other, a treadle for throwing in the power means, a hand piece in inoperative position, and mechanism actuated by the hand piece when it is moved from inoperative position for rendering the power means ineffectual.

11. Ina starting and stopping mechanism, the combination of a transmission shaft, power means and manual means for operating the shaft each to the exclusion of the other, a treadle for throwing in the power means, a hand piece for throwing in and operating the manual means, means for locking the hand piecein inoperative position while the power means is capable of being applied to operate the machine,'means for preventing manual operation of the shaft by the hand piece after it is unlocked and until the hand piece is given a preliminary -movement, and means actuated by preliminary movement of the hand piece for rendering the power means ineffectual.

12. In a starting and stopping mechanism, the

combination of a shaft, a brake to arrest rotation of the shaft, means for transmitting power to the shaft, manual means for operating the shaft, a treadle for throwing in the power means and releasing the brake, and means common to the power means and the manual means for rendering one of them ineffectual to turn the shaft while the other is effectual, the means common ,to the power means .andthe manual means, being ineffectual to prevent the release of the brake by.

depressing the treadle.

13. .In a starting and stopping mechanism, the combination of a shaft, a brake to arrest rotation of the shaft, power means and manual means for operating the shaft alternatively, and means for preventing operative connection between the shaft and the manual means while the power means is operatively connected thereto, the means for preventing operative connection between the shaft and the manual means being ineffectual to prevent therelease of the brake.

14. In a stopping and starting mechanism, a rotary driven member, a brake for stopping the member, a plunger which is reciprocated by the rotary member, a swinging arm between the plunger and the brake, and treadle actuated means for operatively connecting the swinging arm and plunger to cause the arm to be swung by the plunger and apply abraking pressure to the member.

15. In a treadle operated stopping and starting mechanism, a rotary driven member, a brake for stopping the member, a plunger which is reciprocated by the rotary member, a swinging arm between the plunger and the brake, and a latch adapted to connect the plungerand the swinging arm when the treadle is actuated to stop the machine and cause the arm to move about its swinging point toapply the brake.

16. In a stopping and starting mechanism, 'a

rotary driven member, a brake for stopping the member, a plunger which is reciprocated by the rotary member, a pivotally mounted pressure transmitting arm between the plunger and brake normally held in position with the brake inactive, and a treadle actuated latch mounted on said arm and arranged to engage the plunger to apply the brake.

17. In a stopping and starting mechanism, a rotary driven member, a brake for stopping the member, a plunger which is reciprocated by the rotary member, a pivotally mounted pressure transmitting arm between the plunger and the brake, a catch adjustably connected to the plunger, a latch carried by the pivoted arm, and treadle controlled means for placing the latch and the catch in operative relation to apply the brake by swinging movement of the arm when the machine is to be stopped.

18. In a stopping and starting mechanism, a rotary driven member housed within a column, a brake housed within the column for stopping the member, a plunger reciprocated by the rotary member, and a swinging pressure transmitting arm operatively connected to the plunger and arranged to be moved by the plunger to apply the brake to stop the machine.

19. In a stopping and starting mechanism, a column, a rotary driven member housed within the column, a brake housed within the column for stopping the member, a plunger reciprocated by the rotary member, and a swinging pressure transmitting arm operatively connected to the plunger and arranged to be moved by the plunger to apply the brake when the machine is to be stopped.

THOMAS H. SEELY. 

